Malicious PDF — malware analysis report

Static analysis result for SHA-256 a73d166d0953ecf7…

MALICIOUS

PDF

56.6 KB Created: 2020-08-03 17:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 71c71ee2bae7ad0ca506549b9fbac6ef SHA-1: e3a201428d875ae96153e0965e74f9861f54cc15 SHA-256: a73d166d0953ecf736453770fb46efe53b112e26787afd732c9c18f2fe18f7f3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=codeigniter+hmvc+tutorial+pdf'. This URL is presented within the document body, disguised as a tutorial. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The primary malicious link is the most critical IOC.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=codeigniter+hmvc+tutorial+pdf In PDF document text
    • http://files.vielka.com/uploads/1/3/2/6/132695428/dobez_jifofelofolu_mewan.pdfIn PDF document text
    • http://files.seinepacific.com/uploads/1/3/1/3/131380871/netifinu-jolove.pdfIn PDF document text
    • http://files.ardentrive.com/uploads/1/3/0/7/130740175/pokib_xodedakadikasuf_lexujepege.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1722/3847/files/83803256787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/59607062369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/fixugivogovevadeneresexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/16826371615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/dodefarukawonutasiwiwepam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0105/2321/files/30504426294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4316/8156/files/dopese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/11489262963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4713/2068/files/17419299123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8062/1984/files/panasonic_fax_machin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0074/9467/files/bisowix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/fenubotexerobunelekaf.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
🗂 Part of campaign: ardentrive.com 3 samples

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000973f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x973F 5356 bytes
SHA-256: 6f689184532be30d45174d366357a23489094d6e8b958e88971ca56b72b5df99
font_01_sfnt_off0000a952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA952 13736 bytes
SHA-256: 06170b24ef175eeac0bf5c734983284cefe8c26358ad22ed6ce8a3bf73c1ccc4

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